18324736 has 36 divisors (see below), whose sum is σ = 37380672. Its totient is φ = 8961536.

The previous prime is 18324707. The next prime is 18324737. The reversal of 18324736 is 63742381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18324737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11271 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (1038352).

Almost surely, 2^18324736 is an apocalyptic number.

18324736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18324736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18690336).

18324736 is an abundant number, since it is smaller than the sum of its proper divisors (19055936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18324736 is an equidigital number, since it uses as much as digits as its factorization.

18324736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1572 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 18324736 is about 4280.7401229227. The cubic root of 18324736 is about 263.6407725130.

The spelling of 18324736 in words is "eighteen million, three hundred twenty-four thousand, seven hundred thirty-six".